Sash-balance



(No Model.)

B. H. L. ARRINGDALE.

SASH BALANCE.

No. 442,502. Patented Dec. 9, 1890.

M Ema W6 H L NrTnn STATES PATENT OFFICE.

RICHARD II. Ii. ARRINGDALE, OF RADFORD, VIRGINIA.

SASH-BALANCE.

SPECIFICATION forming part of Letters Patent No. 442,502, dated December 9, 1890.

Application filed October 10, 1890- Serial No. 367,721. (No model.)

To all whom, it may concern:

Be it known that I, RICHARD H. L. ARRING- DALE, a citizen of the United States, residing at Radford, county of l\lontgomery, and State of I irginia, have invented certain new and useful Improvements in Spring Sash Balan ees, of which the following is a specification.

This invention relates to balances for window-sash in which the window is supported by a tape wound upon aspring-drum, said drum being provided with a suitable brake bearing upon it for preventing the weight of the window from overcoming the spring or preventing the spring from overcoming the weight of the window; and my invention consists in. certain improvements in the construction of the brake adapted to operate upon the spring-drum.

My invention consists in the combination, with the spring-drum of a sash-balance, of a brake consisting of approximately parallel brake-levers adapted to bear upon opposite sides of the drum and provided with upper ends inclined toward each other, a spreadinglever, and means for moving said lever at will, so that any required pressure may be placed upon the sides of the drum, said means for operating the spreading-lever being constantly within convenient reach from the outside of the window-jamb.

In order that my invention may be fully understood, I will describe it with reference to the accompanying drawings, forminga part of this specification, and in which- Figure I is a side elevation of the sash-ba1- ance complete. Fig. II is a rear elevation of the same. Fig. III is a front view of the same, and Figs. l.\ and V are detail views representing the manner of mounting the rocking arms in the frame, Fig. V being a horizontal section through the rocking arms and the frame.

1 represents the frame; 2, the spring-drum; 3 and 4, the brake. The frame consists of the face-plate 5, having the perforations 6 for attaching it to the windoW-jamb, and a counter-sink 7, into which projects the controlling end of the screw for operating the brake, a hollow boss being formed on the back of the face-plate, in which the countersink 7 is made, and the side plates 9, having the square slot 10, upon which the drum is mounted. The

brake at consists of the rocking arms 11, having shafts 12, mounted in the face-plate, lower contact ends 13, which bear upon opposite sides of the drum, and the upper inwardly;

inclined ends 14, the spreading-lever 15, havthe end 16, which contacts with and spreads the ends ll of the brake-levers, and the upper perforated end 17, through which passes the operating-screw 18, and the operating means consisting of the screw having the head 19, the spring 20, located between the head 19 and the upper end 17 of the spreading-1ever, and the controlling end 21, which is threaded into the hollow boss and within reach from the exterior. The spreadinglever is mounted by means of a crotch or cog 16 on a pin 22, which is mounted in the two side plates.

The drum has a square axle mounted in the sideplatesand to theaxlethespringisattached, so that the drum will rotate with the lifting of the window. \Vhen the window is raised, the force of the spring and the friction of the brake will combine to hold the window. The shafts of the rocking lever extend horizontally along the inner sides of the side plates and are riveted or embedded in the face-plate in such a way that they can rotate therein. The spreading-arm being journaled in the side frame and having means for moving its upper end,it will be seen that the lower end, which is between the inwardly-inclined ends 14 of the brake-levers, will spread said levers when the upperend is moved toward the faceplate by turning the screw 21 in the boss 3.

Any desired pressure may be placed upon the side of the spring-drum, so that the same spring will serve for a great many differentsized sashes. It will also be seen that my device is simple and effective and will not get out of order easily, and at the same time it is very easily made.

Having thus described my invention, the following is what I claim as new therein and desire to secure by Letters Patent:

1. In a sash-balance, the combination, with the spring-drum, of the brake consisting of the approximately parallel brake-levers having their ends inclined toward each other, a spreading-block adapted to move between the inclined ends and spread them apart, and means for moving said block, substantially as and for the purpose set forth.

2. In a spring-balance, the combination, with the spring-dru1n,0f the pivoted brakem'ms bearing toward each other on opposite sides of the spring-drum and having the inclined ends, and the spreading-lever having one end moving between the inclined ends for spreading them and the other end provided vwith means for controlling the lever, as and for the purpose set forth.

3. In a spring-balance, the combination of the face-plate, the side plates, the springdruin mounted in the side plates, the rocking brake-arms pivoted in the face-plate, the spreading-lever pivoted in the side plates,

and the screw mounted in the face-plate and 1 en gagingthe spreading-lever, all substantially as and for the purpose set forth.

RICHARD H. L. ARRINGDA'LE.

Witnesses:

HERVEY S. KNIGHT, OCTAVIUS KNIGHT. 

